Add 2018/yang/try.sh + format/typo checks

The try.sh script will ask if the user wants to see the spoilers before
showing them. The rest of it is shown regardless (first).

Format/typo check README.md file.

2018/yang/try.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2018/yang
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+read -r -n 1 -p "Press any key to run: ./left < prog.c (space = next page, q = quit): "
+echo 1>&2
+./left < prog.c | less -EXF
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./right < prog.c (space = next page, q = quit): "
+echo 1>&2
+./right < prog.c | less -EXF
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./left < prog.c | ./left (space = next page, q = quit): "
+echo 1>&2
+./left < prog.c | ./left | less -EXF
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./shift < prog.c (space = next page, q = quit): "
+echo 1>&2
+./shift < prog.c | less -EXF
+echo 1>&2
+
+echo "$ echo IOCCC | ./left" 1>&2
+echo IOCCC | ./left
+echo 1>&2
+echo "$ echo IOCCC | ./right" 1>&2
+echo IOCCC | ./right
+echo 1>&2
+echo "$ echo IOCCC | ./shift" 1>&2
+echo IOCCC | ./shift
+echo 1>&2
+
+echo "$ ./msg0" 1>&2
+./msg0
+
+echo "$ ./msg1" 1>&2
+./msg1
+
+echo "$ ./msg2" 1>&2
+./msg2
+
+read -r -p "Do you wish to see some of the spoilers (Y/N)? "
+if [[ "$REPLY" == "Y" || "$REPLY" == "y" ]]; then
+    echo "$ make spoilers" 1>&2
+    make spoilers
+    rm -f generated*.c msg*.c
+    echo "$ make i_give_up_show_me_the_spoilers"
+    make i_give_up_show_me_the_spoilers
+    echo 1>&2
+    for i in 0 1 2 3 4 5 6 7 8 10; do ./msg"$i"; done
+    ./msg9 < prog.c
+fi